Effects of Cu/Al compound addition on the anti-corrosive and magnetic properties of (Pr, Nd)12.8Dy1.0FebalNb0.1B6.0 (at%) sintered magnets were investigated. It is found that the corrosion current density decreases from 46.90 μA·cm-2 for the magnet without Cu/Al to 11.14 μA·cm-2 for the magnet with additions of 0.6 at% Al and 0.2 at% Cu in 0.001 mol/L HCl solutions, the mass loss reduces from 13.2 mg·cm-2 to 0.4 mg·cm-2 in hot/humidity atmosphere for 100 h. The 0.6 at% Al- and 0.2 at% Cu-added magnet has the maximum corrosion resistance. The improvement of the corrosion resistance can be ascribed to the enhanced chemical stability and the optimized distribution of (Pr, Nd)-rich grain boundary phase. Additionally, the optical grain boundary microstructure is benefit for the magnetic properties